The never ending GMAIL Bounce back

anyone found a solution that has worked? 

    host gmail-smtp-in.l.google.com [142.250.102.26]

    SMTP error from remote mail server after end of data:

    550-5.7.26 This message does not pass authentication checks (SPF and DKIM both

    550-5.7.26 do not pass). SPF check for [premiercoachesnw.com] does not pass

    550-5.7.26 with ip: [66.96.189.4].To best protect our users from spam, the

    550-5.7.26 message has been blocked. Please visit

    550-5.7.26  https://support.google.com/mail/answer/81126#authentication for more

    550 5.7.26 information. qw29-20020a1709066a1d00b008c1ecaddec4si14420508ejc.34 - gsmtp